Oscillating device for blood examination

Abstract

The utility model relates to an oscillation device for blood examination, which comprises a fixed cylinder and a rotating disc coaxially arranged in the fixed cylinder, the inner side wall of the fixed cylinder is provided with a limiting groove along the circumferential direction, and the groove bottom of the limiting groove forms a wavy guide rail structure distributed along the circumferential direction; a plurality of oscillation blocks are circumferentially distributed on the rotating disc, elastic connecting parts are arranged at the near ends of the oscillation blocks, rollers are arranged at the far ends of the oscillation blocks, and the rollers are embedded into the limiting grooves and are in rolling fit with the groove bottoms; and when the rotating disc rotates, each roller moves along the fluctuating track of the groove bottom to force the corresponding oscillation block to generate periodic radial swing. According to the device, the wave guide rail drives the oscillation blocks to periodically perform centrifugal and centripetal alternate motion, and meanwhile, the rotating disc is driven to integrally rotate, so that the sample container forms compound motion of horizontal rotation and radial oscillation, and the layering phenomenon of a blood sample is effectively eliminated. Compared with a vertical oscillation structure, the horizontal radial swing mode can prevent the sample container from falling off without an additional fixing device, and the safety performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to blood test technical field especially, it relates to a blood test is with oscillation device. BACKGROUND

[0002] Routine blood test as one of the core means of clinical medical diagnosis, its detection result has important reference value to infectious disease discrimination, blood system anomaly screening and chronic disease monitoring. The detection can assist judging body inflammatory response, anemia degree, coagulation function and immune state through analyzing various cell morphologies, quantity and proportion changes in blood, provides key basis for disease early warning and disease course evaluation.

[0003] In the blood sample processing link, the whole blood sample under the action of anticoagulant still has dynamic coagulation risk. After blood is separated from the body, fibrinogen conversion and platelet aggregation effect caused by coagulation factor activation can cause sample microstructure change, if uniform mixing of anticoagulant and blood cannot be realized, microclot invisible to the naked eye can be formed. Such microscopic changes not only can block the microfluidic channel of the precision detection instrument, but also can cause cell count deviation, morphological misjudgment and other problems. The current manual mixing operation mode has significant limitations: on the one hand, medical staff repeated shaking of test tube can easily lead to operation fatigue, and it is difficult to ensure the standard processing quality of dozens of samples per hour; on the other hand, the force and frequency of manual operation lack quantitative standard, and insufficient or excessive shaking phenomenon can easily occur, the former can cause sample stratification or cell sedimentation, and the latter can cause mechanical damage to blood cells. How to realize efficient and standardized mixing of blood samples has become a key technical link to improve the consistency and reliability of test results.

[0004] CN221933756U discloses a blood test oscillation device, which realizes sufficient mixing of blood samples through the synergistic effect of rotating mechanism and vertical vibration mechanism. Although the device adopts the friction fixing mode of elastic lining on the inner wall of test tube groove, the following technical defects still exist in actual application.

[0005] Firstly, since the device simultaneously generates axial vibration and rotating centrifugal motion, the test tube will bear multi-directional composite inertia force. When the system is in high-frequency oscillation or large-amplitude working condition, the static friction force of the elastic lining is easy to be broken through, resulting in axial displacement of the test tube in the movement process or even complete disengagement. Although increasing the friction coefficient of the lining can improve the restraint force, it will significantly increase the operation resistance of test tube loading and unloading, affecting the equipment use efficiency.

[0006] Secondly, the open sample bearing structure adopted by the device has obvious hidden dangers. The motion platform performs complex motion in three-dimensional space, and the rotating part and the operation area are not physically isolated. This structural defect not only increases the risk of accidental throwing of the sample tube, but also may cause mechanical injury to the operator's limbs if they mistakenly enter the motion area, affecting the operation safety.

[0007] In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, a large number of literatures and patents have been studied by the applicant when making the utility model, but due to the limitation of space, all the details and contents are not listed in detail, but this does not mean that the utility model does not have the characteristics of the prior art. On the contrary, the utility model has all the characteristics of the prior art, and the applicant reserves the right to add related prior art in the background art. Utility model content

[0008] In view of the deficiencies of the prior art, the present application provides an oscillation device for blood testing, which aims to solve one or more technical problems in the prior art.

[0009] The utility model relates to a kind of oscillation devices for blood testing, it includes fixed cylinder and coaxially arranged rotating disc in fixed cylinder, the inner side wall of fixed cylinder is arranged with limit slot along circumference, and the groove bottom of limit slot forms undulating guide rail structure distributed along circumference;Rotating disc is distributed with multiple oscillation blocks along its circumference, and the proximal end of oscillation block is provided with elastic connecting part, and the distal end is provided with gyro wheel, and gyro wheel is embedded in limit slot and is rolled with groove bottom cooperation;When rotating disc rotates, each gyro wheel moves along the track of groove bottom undulating guide rail, forces corresponding oscillation block to generate radial movement, so that elastic connecting part can alternately store and release elastic potential energy in this process, so that oscillation block continues to swing radially to the center or centrifugal.

[0010] The blood testing oscillation device realizes efficient sample mixing and safe operation through the synergistic effect of the wave-shaped guide rail structure and the elastic connecting part. When the rotating disc rotates, the gyro wheels of each oscillation block alternately roll along the wave peaks and troughs of the guide rail, driving the oscillation blocks to periodically swing radially to the center and the center, combined with the overall rotational motion of the rotating disc, forming a complex motion trajectory of the sample container in the horizontal plane, effectively destroying the stratification phenomenon of blood cells and plasma in the blood sample, and ensuring the detection accuracy. The elastic connecting part stores elastic potential energy during the centripetal swing stage and releases energy to assist the gyro wheel movement during the centrifugal swing stage, significantly reducing the driving energy consumption; at the same time, the horizontal radial swing mode cooperates with the centrifugal constraint generated by the rotation of the rotating disc to prevent the sample container from falling off or liquid splashing without additional fixed structure, improving the operation safety. The rolling contact between the gyro wheel and the guide rail and the elastic buffering mechanism greatly reduce the wear of the moving parts and prolong the service life of the device.

[0011] According to a preferred embodiment, the elastic connecting part comprises a fixed rod and a movable rod coaxially matched, the movable rod being slidably sleeved outside the fixed rod; wherein the distal end of the movable rod is fixedly connected to the proximal side of the oscillating block, and the proximal end of the fixed rod is fixedly connected to the rotating shaft at the axis of the rotating disc. The technical solution realizes the elastic connection function through the coaxial sleeving structure of the fixed rod and the movable rod, the movable rod keeps radial rigid support while sliding along the fixed rod in the axial direction, so that the oscillating block has both directional stability and elastic buffering capacity during radial swinging. The coaxial sleeving structure ensures that the oscillating block swinging track strictly extends along the radial direction, avoids motion interference caused by deflection, and protects the sample mixing uniformity. The elastic connecting part stores elastic potential energy through sliding displacement during the centripetal stage, and releases energy to assist the roller to reset during the centrifugal stage, forming an energy recycling mechanism to reduce the driving energy consumption.

[0012] According to a preferred embodiment, the proximal end of the movable rod is provided with an opening for the distal end of the fixed rod to insert, the side wall where the opening is located is outwardly expanded to form a ring-shaped protrusion constituting a support ring; the fixed rod body is sleeved with an elastic member, the distal end of the elastic member abuts against the support ring, and the proximal end abuts against the outer wall of the rotating shaft, so that the radial movement of the movable rod in the plane of the rotating disc can be conducted to the elastic member through the support ring, and then the elastic member is deformed. When the oscillating block is driven by the guide rail to displace radially, the support ring of the movable rod conducts the radial force to the elastic member, triggering the compression or rebound deformation of the elastic member, forming a stable elastic restoring force; the bidirectional abutment design of the elastic member between the outer wall of the rotating shaft and the support ring ensures that the oscillating block always keeps coaxial orientation during swinging, avoiding deflection jam caused by asymmetric stress. In addition, the outward expansion structure of the support ring enlarges the stress contact area of the elastic member, reduces local stress concentration, and improves the fatigue life of the elastic member.

[0013] According to a preferred embodiment, the size of the roller is set as follows: when the roller is located at the trough point of the groove bottom, the elastic member corresponding to the oscillating block of the roller keeps a natural elongation state; when the roller is located at the peak point of the groove bottom, the elastic member corresponding to the oscillating block of the roller is in a maximum compression state. The size matching mechanism ensures that the elastic member deformation strictly follows the fluctuation period of the guide rail throughout the process, avoids energy loss or motion delay caused by travel deviation, makes the radial swinging of the oscillating block accurately synchronized with the guide rail waveform, and protects the sample mixing uniformity.

[0014] According to a preferred embodiment, the radial dimension of the oscillation block is configured to form a clearance with the inner side wall of the fixed cylinder when the corresponding elastic member is in a natural elongation state, so that the oscillation block is kept in a non-contact state with the fixed cylinder in the radial direction. When the elastic member is in a natural elongation state, the non-contact design of the oscillation block distal end and the inner side wall of the fixed cylinder completely eliminates the risk of friction between the two, avoiding precision decay or component damage due to mechanical wear; during the outward centrifugal movement of the oscillation block driven by the guide rail, the clearance provides sufficient buffer space for the compression deformation of the elastic member, preventing rigid collision between the oscillation block and the fixed cylinder, and ensuring smooth and coherent swinging action.

[0015] According to a preferred embodiment, the rotating disc comprises a plurality of guide blocks arranged adjacent to the oscillation block along the circumferential direction thereof, each guide block being provided with a sliding rail towards the side surface of the oscillation block, and the corresponding side surface of the oscillation block being provided with a matching sliding block; when the oscillation block performs centrifugal or centripetal motion, the corresponding sliding block slides along the corresponding sliding rail, so that the movement trajectory of the oscillation block is constrained within the plane of the rotating disc, thereby preventing axial deviation. The guiding and restraining effect of the sliding rail and the sliding block effectively suppresses the axial deviation of the oscillation block caused by inertia or external force, avoiding mechanical interference or uneven mixing of samples caused by deviation of the movement trajectory; the sliding fit structure simultaneously reduces unnecessary degrees of freedom during the swinging of the oscillation block, improves the accuracy and repeatability of radial displacement, and ensures the stability of the blood sample oscillation action. The linear sliding of the sliding block along the sliding rail further disperses the local stress during the movement of the oscillation block, reduces the fatigue damage of the connecting components, and prolongs the service life of the device. Such a design maintains a compact structure while achieving self-correction of the movement trajectory through mechanical hard constraint, ensuring the reliability and safety of the equipment under high-speed operation.

[0016] According to a preferred embodiment, the depth of the sliding rail gradually increases from the distal end to the proximal end, so that when the oscillation block performs centripetal motion, the corresponding sliding block moves towards the proximal end along the sliding rail containing it and simultaneously increases the depth of protrusion into the guide block, thereby matching the structural requirement that the volume of the sliding block entering the guide block part increases with the movement distance. When the oscillation block moves centripetally, the sliding block slides towards the proximal end along the sliding rail, and the gradually increasing depth of the sliding rail gradually accommodates the increased embedding volume of the sliding block due to the increase in movement distance, avoiding jamming or local stress concentration caused by structural interference; the wedge-shaped guide surface formed by the gradually changing depth simultaneously enhances the axial constraint force of the movement trajectory of the sliding block, suppressing the slight yaw during the swinging of the oscillation block, and ensuring the accuracy and stability of the radial movement. This design maintains the compactness of the device while achieving dual optimization of movement constraint and structural strength through adaptive adjustment of the geometric form.

[0017] According to a preferred embodiment, the oscillating block is provided with a test tube slot penetrating through the top surface and the bottom surface, the bottom surface of the oscillating block is connected with a vertical rod, the lower end of the vertical rod is provided with a bottom support, and the rod body of the vertical rod is axially provided with a plurality of fixing rings with diameters matched with the sample tubes, so as to form a multi-stage sample tube fixing structure extending from the bottom surface of the oscillating block. The test tube slot penetrating through the top surface and the bottom surface of the oscillating block allows the sample tube to be vertically inserted, and the fixing rings axially distributed on the vertical rod and the bottom support form a multi-stage clamping from top to bottom, which meets the fixing requirements of the sample tube and ensures that the sample tube has no risk of slipping or tilting during horizontal radial swinging.

[0018] According to a preferred embodiment, the slot of the limiting slot is provided with inward flanges on both sides of the slot opening, and the distance between the two flanges is less than the width of the roller, so as to prevent the roller from escaping from the slot opening when the roller rolls in the limiting slot. The structure that the distance between the two flanges is less than the width of the roller forms a rigid mechanical limiting, effectively blocks the lateral deviation or axial movement of the roller when the roller rolls along the wavy guide rail, and completely avoids the risk of motion out of control caused by accidental escape of the roller from the slot opening. The anti-extraction structure does not require additional fixing elements, simplifies the overall layout of the device, reduces the complexity of part processing and assembly through integrated limiting design, and improves the structural reliability and long-term operation safety.

[0019] According to a preferred embodiment, the bottom of the fixing cylinder is fixedly connected with a base, the inside of the base is provided with a motor, and the output shaft of the motor is drivingly connected with the rotating shaft. The rigid connection of the base and the fixing cylinder ensures that the driving force of the motor is stably transmitted to the rotating shaft, reduces the energy loss and vibration interference caused by the intermediate transmission structure, and guarantees the efficient and stable operation of the rotating disc and the oscillating block; the built-in design of the motor effectively compresses the overall size of the device, improves the space utilization, reduces the exposure risk of external moving parts, and enhances the safety of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a preferred internal structure diagram of the oscillating device under an oblique top view angle of the utility model;

[0021] Figure 2 is a preferred internal structure diagram of the oscillating device under an oblique bottom view angle of the utility model;

[0022] Figure 3 is a preferred schematic diagram of the oscillating device cut along the plane where the limiting slot is located;

[0023] Figure 4 is a preferred top view of the partial structure of the oscillating device;

[0024] Figure 5 is a preferred schematic diagram of the oscillating block of the oscillating device in centrifugal motion;

[0025] Figure 6The utility model relates to an optimized oscillation block of an oscillation device makes centripetal motion schematic diagram.

[0026] List of reference signs

[0027] 100: rotary disc, 110: guide block, 111: slide rail, 120: oscillation block, 121: roller, 122: slide block, 130: test tube groove, 131: vertical rod, 132: fixing ring, 133: bottom support, 140: elastic connecting part, 141: movable rod, 142: fixed rod, 143: support ring, 144: elastic piece, 200: fixed cylinder, 210: limiting groove, 211: slot, 212: groove bottom, 220: rotating shaft, 300: base, 310: motor. DETAILED DESCRIPTION

[0028] The utility model will be described in detail below in combination with the drawings.

[0029] Orientation definition: with the geometric center of rotary disc 100 as the reference, along its radial direction (the straight line direction extending from the center to the outer edge), the proximal end refers to the inner side area close to the geometric center of rotary disc 100, and the distal end refers to the area close to the outermost edge of rotary disc 100 in the radial direction.

[0030] As Figure 1 Shown, the blood test oscillation device core structure of this embodiment mainly comprises fixed cylinder 200 and coaxial nested rotary disc 100. Fixed cylinder 200 is vertically arranged columnar hollow shell, and its cross section can be designed as circular, polygon or oval and a variety of geometric shapes. The inner wall of the cylinder is provided with continuous limiting groove 210 along the circumference, and the groove bottom 212 is in the form of wave-shaped undulating guide rail structure, and the wave crest and wave trough are alternately distributed along the circumference to form a closed loop guide rail. Among them, the highest point of the wave crest is close to the radial inner side of the fixed cylinder 200, and the lowest point of the wave trough is located at the radial outer side, forming a continuous radial undulating track. The wave-shaped groove bottom 212 realizes the wave structure in the horizontal plane through the periodic radius change, and the wave peak point corresponds to the minimum radius position of the groove bottom 212, and the wave trough point corresponds to the maximum radius position of the groove bottom 212. It should be noted that the undulating guide rail structure is not limited to the wave shape, and periodic high-low change forms such as sawtooth or stepped shape can also be used. For the convenience of description, the wave-shaped structure is taken as an example for description in this embodiment.

[0031] In combination Figure 1 , Figure 3, the rotating disc 100 is kept coaxial rotation with the fixed cylinder 200 through the central rotating shaft 220, and the disc edge keeps uniform gap with the inner wall of the fixed cylinder 200, and the disc surface is uniformly distributed with a plurality of oscillation blocks 120 along the circumference. The main body of each oscillation block 120 is block structure, and the axis points to the center of the rotating shaft 220, and the proximal end is connected with the rotating shaft 220 through the elastic connecting part 140, and the distal end is equipped with a cylindrical or drum-shaped roller 121 and extends to the area of the limiting groove 210. The roller 121 is rotatably installed in the U-shaped support at the distal end of the oscillation block 120 through a bearing assembly, and the both sides of the support are provided with symmetrical mounting ears connected with the both ends of the roller 121 through a pin shaft. The cylindrical surface of the roller 121 forms rolling contact with the wave surface of the groove bottom 212 of the limiting groove 210.

[0032] The groove wall of the limiting groove 210 is provided with a guide structure, the top slot width is slightly larger than the diameter of the roller 121, and the wave-shaped surface of the groove bottom 212 at the bottom is polished to reduce the friction resistance. The transition area of the wave crest and the wave trough is connected with a smooth curve to avoid sudden change of the motion trajectory. When the roller 121 rolls along the horizontal wave trajectory, its motion is strictly constrained in the plane of the rotating disc 100, forming pure radial displacement excitation.

[0033] When the rotating shaft 220 drives the rotating disc 100 to rotate, the roller 121 moves along the undulating trajectory of the groove bottom 212, forcing the corresponding oscillation block 120 to produce radial movement. In the process of moving from the wave trough to the wave crest, the gradually smaller radius of the groove bottom 212 forces the roller 121 to move towards the rotating shaft 220, driving the oscillation block 120 to move centripetally; in the process of moving from the wave crest to the wave trough, the maximum radius of the groove bottom 212 allows the roller 121 to reset to the outside, driving the oscillation block 120 to move centrifugally. In this process, the elastic connecting part 140 alternately stores and releases elastic potential energy, maintaining the sustained radial swing of the oscillation block 120.

[0034] The rolling contact of the roller 121 and the groove bottom 212 significantly reduces the friction loss, and the continuous wave trajectory of the limiting groove 210 ensures that the oscillation frequency and the rotating speed are synchronized. The reciprocating swing amplitude of the oscillation block 120 is directly determined by the wave crest and wave trough difference of the groove bottom 212, and the motion path is always constrained in the annular space between the fixed cylinder 200 and the rotating disc 100, forming a stable radial oscillation mode.

[0035] As Figure 4As shown, the elastic connecting part 140 specifically comprises a fixed rod 142 and a movable rod 141 coaxially sleeved. The fixed rod 142 is a rigid metal round rod, the proximal end of which is fixed to the surface of the rotating shaft 220 at the center of the rotating disc 100 by welding, bolting or the like, and the distal end extends to the center position of the proximal end side of the oscillating block 120 and keeps a non-contact state with the oscillating block 120. Preferably, the movable rod 141 is a hollow pipe structure, the inner diameter of which is slightly larger than the outer diameter of the fixed rod 142, so as to be able to be sleeved on the outside of the fixed rod 142 in a sliding fit manner. The distal end of the movable rod 141 is rigidly connected to the center position of the proximal end side of the oscillating block 120 through a flange plate, so that the rotating torque of the rotating shaft 220 can be transmitted to the oscillating block 120 through the fixed rod 142 and the movable rod 141. At the proximal end opening of the movable rod 141, the sidewall thereof expands outward to form an annular protrusion to constitute a support ring 143, the inner diameter of the protrusion is larger than the outer diameter of the fixed rod 142, forming an assembly space for accommodating the elastic member 144. The elastic member 144 adopts a cylindrical spiral spring, which is sleeved on the rod body of the fixed rod 142, the distal end face of which abuts against the inner side plane of the support ring 143, and the proximal end face closely abuts against the outer wall of the rotating shaft 220. When the oscillating block 120 is radially displaced under the action of external force, the movable rod 141 slides axially along the fixed rod 142, and the elastic member 144 is squeezed or stretched through the support ring 143, realizing the mutual conversion of mechanical energy and elastic potential energy.

[0036] Preferably, as shown in the drawings, Figures 3 to 6 As shown, the diameter of the roller 121 is designed to be such that when the roller 121 rolls to the lowest point of the trough bottom 212, the elastic member 144 is in a natural elongation state, at this time, a radial clearance of 2-3 mm can be formed between the distal end side of the oscillating block 120 and the inner wall of the fixed cylinder 200, ensuring that the oscillating block 120 will not rigidly collide with the fixed cylinder 200 at the maximum centrifugal position. Preferably, when the roller 121 moves to the highest point of the trough bottom 212, the elastic member 144 is compressed to the limit state, at this time, the distance between the support ring 143 and the outer wall of the rotating shaft 220 reaches a minimum value, and the stored elastic potential energy provides a restoring force for the subsequent centrifugal motion of the oscillating block 120. In this process, the radial size of the oscillating block 120 is designed to ensure that its motion trajectory is always within a safe range, avoiding interference with adjacent components.

[0037] As shown in the drawings, Figures 1 to 3As shown, to constrain the axial displacement of the oscillating block 120, the disc surface of the rotating disc 100 is provided with a guide block 110 on both sides of each oscillating block 120. Preferably, the side surface of the guide block 110 adjacent to the oscillating block 120 is provided with a longitudinal sliding rail 111, which is in a T-shaped groove structure, and the depth gradually increases from the distal end to the proximal end. Correspondingly, the side surface of the oscillating block 120 is provided with a sliding block 122 matched with the sliding rail 111, and the front end of the sliding block 122 is provided with a protruding guide rib which can be embedded into the T-shaped groove of the sliding rail 111 to slide freely. When the oscillating block 120 performs centrifugal or centripetal motion, the sliding block 122 moves linearly along the sliding rail 111, and the depth of the sliding block 122 extending into the sliding rail 111 changes synchronously with the radial position of the oscillating block 120: in centrifugal motion, the sliding block 122 moves to the distal end of the sliding rail 111, and the extending depth decreases; in centripetal motion, the sliding block 122 moves to the proximal end of the sliding rail 111, and the extending depth increases. The gradually changing matching structure effectively matches the volume change of the sliding block 122 with the motion trajectory, ensuring that the contact surface is always in the best stress state.

[0038] As shown in Figure 1 , Figure 2 , the top of the oscillating block 120 is provided with a test tube groove 130 penetrating the upper and lower end faces thereof, which is a circular hole with a diameter slightly larger than the outer diameter of a standard blood sample tube, for vertically inserting the sample tube. A vertical rod 131 is vertically welded to the bottom surface of the oscillating block 120, and a bottom support 133 is threadedly connected to the lower end of the vertical rod 131. The upper surface of the bottom support 133 is provided with a rubber non-slip pad for supporting the bottom of the sample tube. Preferably, a plurality of fixing rings 132 are equally spaced on the rod body of the vertical rod 131, and the inner diameter of each fixing ring 132 is also slightly larger than the outer diameter of the standard blood tube, and the inner side wall thereof can be provided with a flexible rubber pad layer to adapt to the fixing requirements of the sample. The multi-stage fixing structure forms a three-dimensional constraint system extending from the bottom surface of the oscillating block 120 to the lower end of the vertical rod 131, ensuring that the sample tube does not move axially or deviate radially during high-speed oscillation.

[0039] Preferably, the slot 210 is provided with an arc-shaped flange protruding inward on both sides of the slot opening 211, and the distance between the two flanges is slightly smaller than the axial width of the roller 121. When the roller 121 rolls to the wave crest in the limiting slot 210, the inner arc surface of the flange forms a sliding contact with the end surface of the roller 121, generating a radial constraint force to prevent the roller 121 from separating from the limiting slot 210 under the action of centrifugal force. This anti-disengagement structure ensures the freedom of movement of the roller 121 while effectively improving the safety during high-speed operation.

[0040] As shown in Figure 1 , Figure 2As shown, the bottom of the fixed cylinder 200 is provided with a base 300. The base 300 is a sealed box structure, and a motor 310 is installed inside. The output shaft of the motor 310 is rigidly connected to the lower end of the rotating shaft 220 through a shaft coupling. Preferably, a damping rubber pad is filled between the motor 310 shell and the inner wall of the base 300, effectively absorbing the vibration energy generated during operation. The driving system can achieve stepless speed regulation of the rotating disc 100 in the range of 50-300 rpm, meeting the needs of different inspection items for oscillation intensity. In the specific working process, when the motor 310 drives the rotating shaft 220 to rotate, the rotating disc 100 drives each oscillation block 120 to move in a circular motion. The roller 121 rolls along the wavy groove bottom 212 of the limiting groove 210. When the roller 121 moves from the wave crest to the wave trough, the downward trajectory of the groove bottom 212 forces the oscillation block 120 to move outward and centrifugally by the restoring force of the elastic member 144; when the roller 121 moves from the wave trough to the wave crest, the upward trajectory of the groove bottom 212 pushes the oscillation block 120 to move inward and centripetally, and at the same time the elastic member 144 stores elastic potential to complete the motion conversion. In this process, the cooperation of the sliding block 122 arranged on the adjacent side surface of the oscillation block 120 and the sliding rail 111 effectively suppresses the axial swing of the oscillation block 120, ensuring that the motion trajectory is strictly limited in the plane of the rotating disc 100. The sample tube is jointly constrained by the test tube groove 130 and the vertical rod 131 fixing system, and performs a composite motion including rotation and periodic radial swing with the oscillation block 120, realizing the sufficient mixing of the blood sample and the reagent.

[0041] It should be noted that the above specific embodiments are exemplary, and those skilled in the art can think of various solutions under the inspiration of the disclosure of the present application, and these solutions also belong to the disclosed range of the present application and fall within the protection scope of the present application. Those skilled in the art should understand that the present application specification and its drawings are illustrative and not constitute a limitation on the claims. The protection scope of the present application is defined by the claims and their equivalents. In the full text, the features guided by "preferably" are only optional ways, and should not be understood as necessarily provided, therefore the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. An oscillation device for blood test, comprising a fixed cylinder (200) and a rotating disc (100) coaxially arranged in the fixed cylinder (200), characterized in that: the inner side wall of the fixed cylinder (200) is provided with a limiting groove (210) in the circumferential direction, and the groove bottom (212) of the limiting groove (210) forms a wavy guide rail structure distributed in the circumferential direction; the rotating disc (100) is provided with a plurality of oscillation blocks (120) distributed in the circumferential direction, the proximal end of the oscillation block (120) is provided with an elastic connecting part (140), and the distal end is provided with a roller (121) embedded in the limiting groove (210) and rolling matched with the groove bottom (212); when the rotating disc (100) rotates, each roller (121) moves along the track of the wavy guide rail of the groove bottom (212), forcing the corresponding oscillation block (120) to produce radial movement, so that the elastic connecting part (140) can alternately store and release elastic potential energy in the process, so that the oscillation block (120) continuously performs centripetal or centrifugal radial swing.

2. The oscillation device according to claim 1, characterized in that The elastic connecting part (140) comprises a fixed rod (142) and a movable rod (141) coaxially matched, and the movable rod (141) is slidably sleeved outside the fixed rod (142); wherein the distal end of the movable rod (141) is fixedly connected to the proximal side of the oscillation block (120), and the proximal end of the fixed rod (142) is fixedly connected to the rotating shaft (220) at the shaft center of the rotating disc (100).

3. The oscillation device according to claim 2, characterized in that The proximal end of the movable rod (141) is provided with an opening for the distal end of the fixed rod (142) to insert, and the side wall where the opening is located is outwardly expanded to form an annular protrusion constituting a supporting ring (143); the fixed rod (142) is sleeved with an elastic element (144), the distal end of the elastic element (144) abuts against the supporting ring (143), and the proximal end abuts against the outer wall of the rotating shaft (220), so that the radial movement of the movable rod (141) in the plane of the rotating disc (100) can be conducted to the elastic element (144) through the supporting ring (143), and then the elastic element (144) is deformed.

4. The oscillation device according to claim 3, characterized in that The size of the roller (121) is set as: when the roller (121) is located at the trough point of the groove bottom (212), the elastic element (144) of the corresponding oscillation block (120) remains in a natural elongation state; when the roller (121) is located at the peak point of the groove bottom (212), the elastic element (144) of the corresponding oscillation block (120) is in a maximum compression state.

5. The oscillating device of claim 3, wherein The radial dimension of the oscillation block (120) is set as: when the corresponding elastic element (144) is in a natural elongation state, the distal side surface of the oscillation block (120) forms a clearance with the inner side wall of the fixed cylinder (200), so that the oscillation block (120) remains in a non-contact state with the fixed cylinder (200) in the radial direction.

6. The oscillating device of claim 1, wherein, The rotating disc (100) comprises a plurality of guide blocks (110) adjacent to the oscillating block (120) distributed along the circumference thereof, each guide block (110) is provided with a sliding rail (111) towards the side surface of the oscillating block (120), and the corresponding side surface of the oscillating block (120) is provided with a matched sliding block (122); When the oscillating block (120) performs centrifugal or centripetal motion, the corresponding sliding block (122) slides along the corresponding sliding rail (111), so that the movement track of the oscillating block (120) is constrained in the plane of the rotating disc (100), thereby preventing axial deviation.

7. The oscillation device according to claim 6, characterized in that The depth of the sliding rail (111) gradually increases from the distal end to the proximal end, so that when the oscillating block (120) performs centripetal motion, the corresponding sliding block (122) moves towards the proximal end along the sliding rail (111) containing it and synchronously increases the depth of protruding into the guide block (110), thereby matching the structural requirement that the volume of the sliding block (122) entering the guide block (110) part increases with the movement distance.

8. The oscillatory device of claim 1, wherein, The oscillating block (120) is provided with a test tube groove (130) penetrating through the top surface and the bottom surface thereof, the bottom surface of the oscillating block (120) is connected with a vertical rod (131), the lower end of the vertical rod (131) is provided with a bottom support (133), and the rod body of the vertical rod (131) is axially distributed with a plurality of fixing rings (132) with diameters matched with sample tubes, so as to form a multi-stage sample tube fixing structure extending from the bottom surface of the oscillating block (120).

9. The oscillatory device of claim 1, wherein, The slot (210) is provided with inward flanges on both sides of the slot opening (211), and the distance between the two flanges is less than the width of the roller (121), so as to prevent the roller (121) from separating from the slot opening (211) when rolling in the limiting slot (210).

10. The oscillatory device of claim 2, wherein, The fixed cylinder (200) is fixedly connected with a base (300) at the bottom, the base (300) is internally provided with a motor (310), and the output shaft of the motor (310) is drivingly connected with the rotating shaft (220).

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